Reenforced-concrete beam



May 19, 1925. 1,538,293.

- l P. B. LoYEAu.

REENFORGED CONCRETE BEAM Filed Feb. 21, 1924 Patented May 19, 1925.

ulsuri-:Dl STATES 1,538,293 PATENT oifiicii.l

rEnRO BERNARDO LYEAU, or BUENOS AIRES, ARGENTINA.

REENroROnn-OONORETE BEAM.

Application led February21, 1924. Serial No. 694,335.

My present invention relates to certain..

improvements in beams or joists for buildings and the like its main obJect being to provide a beam or Joist of reenforced cement concrete which may be easily manufactured and which is of relatively light weight.

The beam or joist'according to my present invention which may be used in connection with any kind of building structure such as reeiiforced concrete, metallic or masonry, has many advantages on those now in use, which is specially due to its reduced weight which is approximately 50% less than the ordinary reenforced concrete beams, and due to the fact that by using such beams, all the usual false-work for the floorings as well as the intermediate joists between the main beams or between the supporting walls may be dispensed with. i

The beams or joists according to my present invention, when placed closely adjacent one to each otliei as will be hereafter explained, form in themselves the Hoor, and in this way the ordinary floor and the falsework for said Hoor may be also dispensed with, whereby a considerable reduction in the weight and the cost of the construction .is obtained. Furthermore and due to the special structure ofl the beams, a seiies of parallel and normal channels are formed within the Hoor, said channels' being adapted to conveniently house the water and gas pipes, electric cables, etc. Furthermore, said passages form a continuous, air chamber by which a good insulation against noises and changes of temperature is obtained.

In order that my present invention may be clearly understood and easily carried intoy Similar" characters of reference denote .same or like parts throughout thesaid drawings.

The beam according to my present iiivention, which. is of cement concrete (its composition being any of those usually used in the art) comprises in its vertical cross-section substantially the form of a double T, the upper arms l of which are shorter than the `lower arms 2, and the web 3 being formed with a series of equidistant and symmetrical openings 4. Said openings, besides considerably reducing the weight of the beam, form a series of parallel transverse channels, as hereiiibefore explained when said beams are placed with the outer edges of their lower arms 2 adjacent to each other.

The upper and lower portions 1 and 2 of the beam are centrally and longitudinally traversed by iron bars 5 and 6 respectively of suitable cross-section, said bars being tied together by means of rods 7 bent in the form of an 8, as shown in Figure l, said tie rods passing vertically through the massive part of the web. The ends of said rods are suitably connected together.

The ends S of the bars 5 and 6 are looped and may be used as anchoring means for the beam.

The lower arms 2 of the beam are loiigitudinally traversed by iron bars` 9 said bars being connected together by a rod l0 passing around the saine and also around the central Abar 6, whereby a rigid reinforcement is obtained.

The number of the tying rods as well as their cross-section and thecross-section of the bars 5 and 6 are selected according to the stress to: be borne by the beam.

The plaster-ceiling may be directly applied to the lower face of the beam and the floor, as usual, to its upper face.

\ It is obvious that many constructional and i other changes may be introduced without departing from the scope of my present invention vwhich has been clearly set forth in the appended claiming clauses.

Having now Vfully described and ascertained the nature of my present invention 4and in what manner the same is to be carried linto practice, I declare that what I claim and desire to protect by. Letters Patent is A reenforced concrete beam comprising a double T-shaped concrete structure having `upper arms and lower arms, said upper and lower arms being connected together by a Web portion having a series of openings formed transversely therethrough; an iron bar arranged longitudinally in the Web portion between said upper arms; an iron bar arranged longitudinally in the portion between said lower arms; a plurality of vertically arranged S-shaped rods in the web portion for securing said bars together; a

longitudinally arranged bar for each lower 10 arm; and a plurality of looped horizontal rods separate from the first-named rods arranged around and connecting` said lastnamed bars together, said looped rods Ihaving their upper members resting on the iron ib bar in the web portion O the lower arms.

In testimony whereof I affix my signature.

PEDRO BERNARDO LOYEAU. 

